Test object e.g. container, integral leak test method, involves measuring and evaluating optical refractive index of ambient gas and/or refractive index of test gas in object as measure for presence and/or for dimension of leakage

摘要

The method involves filling a test object (26) with a test gas, where the test gas leaking from the object arrive into the surrounding or ambient gas surrounding the object arrive into the object with the presence of a leakage (27). An optical refractive index of the ambient gas and/or the refractive index of the test gas in the object is measured and evaluated as measure for the presence and/or for the dimension of the leakage. An independent claim is also included for an arrangement for leak test of a test object such as container and case.